/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.stream.Collectors;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		List<String> list = Arrays.asList("CellA116", "CellA117", "CellA118");
		String result = list.stream()
						    	.map(Object::toString)
						    	.collect(Collectors.joining(","));
 
		System.out.println(result);
	}
}

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